TIANQIUCar Key Fob Battery Replacement by Brand
Find your car brand, get the correct key fob coin cell and swap it in minutes. Lithium coin cells, factory direct with bulk & OEM supply for auto brands.
How do I find my key fob battery by car brand?
Pick your car brand to jump to the exact key fob battery it uses and the replacement guide.
Most Nissan key fobs use a CR2032 — 3.0V cell.
Nissan key fob battery guide →Most Honda key fobs use a CR2032 — 3.0V cell.
Honda key fob battery guide →Most Toyota key fobs use a CR2032 — 3.0V cell.
Toyota key fob battery guide →Most Ford key fobs use a CR2450 — 3.0V cell.
Ford key fob battery guide →Most Mazda key fobs use a CR2032 — 3.0V cell.
Mazda key fob battery guide →Which key fob batteries are most common?
CR2032 is the standard for key fobs, with CR2025 and CR2450 used by specific brands and models.
How to Identify Your Key Fob Battery
Find the fob model
Look for a model number on the fob or the sticker inside the cover.
Read the old cell
The cell is usually marked CR2032, CR2025 or CR2450 — match it exactly.
Check the manual
Your car manual or the brand table below confirms the right size for your model and year.
How to Replace a Key Fob Battery
Tools: a flat-head screwdriver or the built-in key slot, plus a small tool or tweezers.
Open the fob
Pry the seam with a flat-head screwdriver or use the built-in key slot.
Note the polarity
Check which side of the old cell faces up — usually the + faces out.
Remove the cell
Lift the old coin cell out with a small tool or tweezers.
Insert the new battery
Fit the new coin cell with the correct polarity and re-seat it.
Close & test
Snap the case closed and test the remote lock/unlock and start buttons.
What do buyers ask about key fob batteries?
How do I open my key fob to change the battery?
What battery does a Nissan, Honda or Toyota key fob take?
How long do key fob batteries last?
Why does my key fob not work after a battery change?
Where can I buy a key fob battery?
Which key fob battery guides should I read?
CR2032 Battery
The standard 20mm lithium coin cell for most key fobs.
View CR2032 →CR2025 Battery
Thinner 20mm cell used by some fobs and remotes.
View CR2025 →CR2450 Battery
Larger 24.5mm cell for Ford and other fobs.
View CR2450 →Watch Battery
Silver-oxide watch battery replacement guide.
Watch guide →CMOS Battery
CR2032 motherboard CMOS battery replacement guide.
CMOS guide →All Button Cells
Browse every coin cell model from the TIANQIU factory.
View all →How do I buy key fob batteries in bulk?
Factory-direct CR2032, CR2025 & CR2450 coin cells for key fobs and automotive wholesale. Get a quote today.